Roy's current physical ability is his problem, the chin is only one part of it.

He still has that mental side of the game down as far as thinking he can do all the things he used to do, unfortunetly that's not a good thing. His speed has slowed, his reflexes are gone, his power left him nearly 10 years ago when he jumped down from heavy...he's simply a slow, chinny, shell of a fighter at this stage.